<template>
  <div>
<!--    面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>

<!--    卡片视图区域-->
    <el-card>

<!--        添加角色按钮区域-->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
      <!--        角色列表区域-->
      <el-table :data="rolelist" border stripe>
        <!--        展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
<!--              渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
<!--              渲染二级权限-->
              <el-col :span="19">
<!--                通过for循环嵌套渲染二级权限-->
                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre>
              {{scope.row}}
            </pre>
          </template>
        </el-table-column>
<!--        索引列-->
        <el-table-column type="index"></el-table-column>

          <el-table-column label="角色名称" prop="roleName">
          </el-table-column>
          <el-table-column label="角色描述" prop="roleDesc">
          </el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">
                分配权限
              </el-button>
            </template>
        </el-table-column>
      </el-table>



    </el-card>
<!--    分配权限的对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
<!--      树形控件-->
      <el-tree :data="rightsList"
               :props="treeProps" show-checkbox node-key="id"
               default-expand-all="" :default-checked-keys="defKeys"
               ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary"  @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: 'role',
    data(){
      return{
        // 所有角色列表数据
        rolelist:[],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        // 所有权限的数据
        rightsList:[],
        // 树形控件的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中的节点ID值数组
        defKeys:[],
        // 当前即将分配角色的id保存
        roleId:''
      }
    },
    created () {
      this.getRoleList()
    },
    methods:{
      async getRoleList(){
        const{data:res}=await this.$http.get('roles')
        if(res.meta.status!==200){
          return this.$message.error('获取角色列表失败')
        }
        this.rightsList=res.data
        this.rolelist=res.data

        console.log(this.rolelist)
      },
      // 根据id删除对应的权限
      async removeRightById(role,rightId){
        // 弹框提示用户是否要进行删除
        const confirmResult=await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult!=='confirm'){
          return this.$message.info('取消了删除')
        }

        const{data:res}=await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status!==200){
          return this.$message.error('删除权限失败')
        }
        role.children=res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId=role.id
      // 获取所有权限的数据
        const {data:res}=await this.$http.get(`rights/tree`)
        if(res.meta.status!==200){
          return this.$message.error('获取权限数据失败')
        }
        this.rightsList=res.data
        console.log(this.rightsList)
        // 递归获取三级节点的id
        this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisible=true

      },
      // 通过递归的形式，获取角色下所有三级节点的id，并保存到数组defKeys中
      getLeafKeys(node,arr){
        // 如果当前节点你不包括children属性，则是三级节点
        if(!node.children){
          return arr.push(node.id)
        }
        node.children.forEach(item=>this.getLeafKeys(item,arr))
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys=[]
      },
      //点击为角色分配权限
      async allotRights(){
        const keys=[
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr=keys.join(',')
        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

        if(res.meta.status!==200){
        return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRoleList()
        this.setRightDialogVisible=false
      }
    }
  }
</script>

<style scoped>
.el-tag{
  margin:7px
}

  .bdtop{
    border-top:1px solid #eee;
  }

  .bdbottom{
    border-bottom:1px solid #eee;
  }

  .vcenter{
    display:flex;
    align-items: center;
  }
</style>
